Grandpa used to tell stories of the Longhairs storming the village.
Tips
history
The Taiping rebels (1851–1864) refused the Qing queue and let all their hair grow, so their enemies called them 长毛; the name is hostile. The rebels' own state was the 太平天国.
mistakes
With 长 read zhǎng, "to grow", 长毛 means "to grow hair" or "to go mouldy": 面包长毛了 "the bread has gone mouldy".